George h



(No Model.)

G. HOHATILLON.

nm N I R P S D N U 0 P M 0 0 $10,505,092. Patent-ed Sept. '19, 1.893.

INVENTQOH 4 TTOH/VEYS.

UNITED STAT S PATENT OFFICE.

GEORGE H. OHATILLON, OF NEW YORK, N. Y

COMPOUND SPRING.

SPECIFICATION forming part of Letters Patent No. 505,092, datedSeptember 19, 1893.

Application filed May 11, 1893.

To all whom it may concern:

Be it known that I, GEORGE H. CHATILLON,

V a resident of the city, county, and State of like viewof the same withthe outer springs removed and the internal sleeve sprung out in aposition to be removed. Fig. 3 is a side View at right angles to thatshown in Fig. 2, showing the fastening disk attached.

My invention relates to compound springs, that is to say, a structurecomposed of two or more separate springs, and consists mainly incombining one or more spiral springs acting expansively with one or morespiral springs acting contractively and with an appropriate holder, allas described and claimed.

In the drawings A designates the central supporting rod of my newcompound spring. This rod has a suitable enlargement a on the lower end,for supporting one or a series of concentric spiral springs, 1, 2, 3,three being shown. At the upper portion of the rod A is a shoulder 12for purposes hereinafter described.

B indicates a sleeve which consists of two sections 0, d, united at thetop by a hinged or flexible connection to a top plate e which forms abearing against which the upper ends of the springs 1, 2, 3, canbear,and which is perforated centrally to fit the rod A below theshoulder 19. The lower end of each section 0, d, connects by an inclinedarm-f with a lower stem g, the two stems g 9 being, when the parts arein operative position, as in Fig. 1, in contact with oneanother. In factthe contiguous stems g serve as connections with the article to besuspended elastically from the rod A. The contracted portions f f alsoserve as a bearing for a disk h, whichhelps support one or a series ofspiral springs 4, 5; or one of said springs (4) may bear against thecontracted part f of the sleeve, the other (5) against the disk h as inFig. 1. The disk it also serves to hold the stems g g in contact withone another. The upper ends of the springs 4, 5, are supported by a bari which Serial No. 473,837. (No model.)

springs 1, 2, 3. Then the spring 4 (one or more) is passed over thesleeve B till it bears against the contracted end f. Next the periforated disk h is slipped on the arms 9 of said sleeve, then the spring5 is slipped on till it bears on the disk 71, and finally the bar i isturned into the convolutions of the springs 4, 5, so as to form asupport therefor (as shown in Fig. 1), when the compound spring is readyfor use.

When I refer herein to the upward or down ward movement of a part or thetop or bottom of certain parts, &c., I do so merelyfor the purpose ofexplaining the drawings, and

desire it understood that my improved spring is applicable to anydevices wherein coiled springs are used and in any relation therein.

The springs 1, 2, 3, meaning those which di rectly surround the rod Aand which rest on the head or enlargement a thereof, are open coiled, sothat they permit of compression longitudinally whenever by drawing onthe stems g the upper plate e of the sleeve is drawn downward. Thisupper plate 6 when drawn downward comes into contact with the upper endsof these open coiled springs 1., 2, 3, and pushes them together. Thesesprings, therefore, tend after that to re-elevate the sleeve B andwhatever load is suspended therefrom, and in this sense they act ascushions for the said sleeve and anything suspended therefrom. The outerseries of springs, 4, 5, are closed coiled as shown, so that they cannotbe compacted beyond the normal position in which they are applied. Whentherefore tension is applied to the stems g 9 these outer series ofsprings follow the sleeve B in its downward movement, because they areconnected to said sleeve either at the inclined portions f or by thedisk It, or both, and thus these springs 4, 5, under strain areexpanded. Hence, I term the inner series of springs 1, 2, 3,contractible, and the outer series of springs expansible, because theones contract and the others expand under strain. I find that thiscombination of contractible and'eX- pansible coiled springs around thesame stem Works desirable results, and that in cases of overstrain itacts as a safety cushion. Supposing my structure to be employed forsuspending a platform from a bridge or viaduct, and that under strainsome of the expansive springs should break; the contractive springs,however, will under all circumstances still constitute a cushion. Thestrain is divided, and being divided between oppositely tending forces,is less liable to work any injury than when all the forces work in thesame manner under tension. A special advantage connected with myconstruction is also to be found in the simple arrangement for puttingthe parts together and taking them asunder. To take the structure apartit is only necessary to turn the rod 2' out of the convolutions of thesprings 4, 5; thereupon to slip the spring 5 down oii the sleeve androd; then take off the disk h. This releases the spring 4, and afterthat is ofif, leaving the parts in the position shown in Fig. 2, thesleeve can be easily opened and moved upward, so that theinteriorsprings may also be gotten at. It is important that the sleeve should bejointed in such a way that its two wings or portions 0 d can be openedout in the manner shown in Fig. 2, because if said parts a d were sonarrow as to expose the whole diameter of the inner springs betweenthem, there would be danger of the lower end of the rod A slipping outlaterally from between the arms a d of the sleeve under strain; butinasmuch as the armsc d of my sleeve 13, as is clearly shown in Fig. 1,approach one another sufficiently far to prevent the head a passing outbetween them, the danger above mentioned is entirely overcome.

Having now described my invention, what I claim, and desire to secure byLetters Patcut, is

1. The combination of a central rod or stem with one or more open coiledsprings 1, 2, 3, cushioning contractively, and with one or more closelycoiled springs, cushioning expansively, and with means substantially asdescribed for supporting both sets of springs on said rod, all asspecified.

2. The combination of the rod A having head or enlargement a andshoulder b, with the sleeve B carried by said rod and adapted to beopened and shut, with one or more open coiled spiral springs 1, 2, 3supported on the head a, and with one or more closed coiled springs 4, 5bearing against the sleeve 13, and with a holder t resting on theshoulder 19 and connecting with the outer spring or springs, all as andfor the purpose specified.

3. The combination of the central rod A having head a and shoulder 12with the open coiled spring or springs 1, 2, 3, sleeve B forming stems gg, disk It, closed coiled spring or springs 4, 5, and rod t' resting onshoulder Z), all arranged as and for the purpose specified,

GEORGE H. CHATILLON.

Witnesses:

CHARLES E. SMITH, L. M. WAoHsoHLAeER.

